Now answer two questions:
1. What has happened to Personal Income Tax over the time period?
2. How much Personal Income Tax was raised in 2000?
Question 1 is easy with a line chart, Question 2 is not.
Remember this: EVERY visualisation is a compromise. The second question can't be answered without some sort of precision. A table gives you precision, if that's what is most important.
Why bother in Tableau?
Let's repeat the mantra I just said: EVERY visualisation is a compromise.
And now add Ben Schneiderman's visualisation mantra: Overview....Zoom and Filter.... Details on Demand.
What's that got to do with Tableau? Dashboards and multiple perspectives on data. With Tableau you can get the best of both worlds. You can draw the time series, and the table. Either draw all the info in each or link them with Actions.
My conclusion from this: Tables are valid as part of the analytical cycle. They are often necessary and form a key part of many well designed dashboards. Therefore - yes, Tableau should continue making our tables amazing and beautiful.